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Caullery & Mesnil, 1896

Operculum with a distal cuticular cup about 0.1 mm in diameter. Longitudinal ridges on the cup give the effect of a scalloped or castellated margin under certain angles of illumination. The cup is distal to a heart-shaped ampulla and peduncle with side-branches.
Collar chaetae plain and bordered.

Up to 5 mm long.

About 0.2 mm in diameter and slightly flexible, usually part of a delicate tracery of tubes that are often branched.

Abdomen whitish, transparent. Crown greenish-white.

In rock clefts; sublittoral.

English Channel up to Straight of Dover, Mediterranean, Australia.

Josephella marenzelleri